T-Shaped Probe Waveguide Antenna: A Wideband Reconfigurable Circular-Polarized Single-Port Antenna

Naoto USAMI  Akira HIROSE  

IEICE TRANSACTIONS on Electronics   Vol.E100-C   No.5   pp.490-495
Publication Date: 2017/05/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E100.C.490
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
circular polarization,  polarization switching,  PIN diodes,  

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We propose a wideband reconfigurable circular-polarized single-port antenna to realize high-density linear integration for use in ground penetrating radars. We switch PIN diodes at a T-shaped probe to change its polarization. The forward- and reverse-biased probes work in cooperation to generate circular polarization. Experiments demonstrate the working bandwidths of 20.0% and 18.6% in the left- and right-hand polarization states, respectively, with 7.2 GHz center frequency. They are wider than those of conventional reconfigurable single-port circular-polarized antennas.